<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>CSS 3-skew</title>
    <style type="text/css">
        .container{
            width:200px;
            height:200px;
            border:1px solid #ccc;
            background:greenyellow;
            transform:skew(20deg);
            -webkit-transform:skew(20deg);
            -o-transform:skew(20deg);
            -moz-transform:skew(20deg);
            -ms-transform:skew(20deg);
            position:fixed;
            margin:auto;
            top:0;
            left:0;
            right:0;
            bottom:0;
        }
    </style>
</head>
<body>
    <div class="container">this is div atom</div>
</body>
</html>
